V-1 flying bomb | bomb | Bomb the Bass | laser-guided bomb | balloon | Bomb | Tsunami Bomb | Soviet atomic bomb project | Balloon (aircraft) | Gama Bomb | Five Weeks in a Balloon | bouncing bomb | Bomb the System | Bomb disposal | Warrington bomb attacks | The Red Balloon | The Nude Bomb | The Bomb Squad | The Bomb (band) | The Bomb | New Bomb Turks | Let the Balloon Go | Letter bomb | flying bomb | Fashion Bomb | Drop da Bomb | Bouncing bomb | Bomb The System | Barrage balloon | B41 nuclear bomb |
During World War II, the Imperial Japanese Army established its secret institute, the Number Nine Research Laboratory, for researching special weapons, such as balloon bombs, counterfeit bills, and other chemical and biological weapons.